WO2010049328A2 - Bearing arrangement of a vertically standing drive spindle - Google Patents

Bearing arrangement of a vertically standing drive spindle Download PDF

Info

Publication number
WO2010049328A2
WO2010049328A2 PCT/EP2009/063804 EP2009063804W WO2010049328A2 WO 2010049328 A2 WO2010049328 A2 WO 2010049328A2 EP 2009063804 W EP2009063804 W EP 2009063804W WO 2010049328 A2 WO2010049328 A2 WO 2010049328A2
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
angular contact
contact ball
ball bearing
axial
Prior art date
Application number
PCT/EP2009/063804
Other languages
German (de)
French (fr)
Other versions
WO2010049328A3 (en
Inventor
Armin Müller
Richard Negele
Original Assignee
Schaeffler Technologies Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies Gmbh & Co. Kg filed Critical Schaeffler Technologies Gmbh & Co. Kg
Publication of WO2010049328A2 publication Critical patent/WO2010049328A2/en
Publication of WO2010049328A3 publication Critical patent/WO2010049328A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • F16C25/08—Ball or roller bearings self-adjusting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
    • B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
    • B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
    • B23Q5/404—Screw bearings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/545—Systems comprising at least one rolling bearing for radial load in combination with at least one rolling bearing for axial load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C39/00—Relieving load on bearings
    • F16C39/02—Relieving load on bearings using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/30—Application independent of particular apparatuses related to direction with respect to gravity
    • F16C2300/34—Vertical, e.g. bearings for supporting a vertical shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General build up of machine tools, e.g. spindles, slides, actuators

Definitions

  • the invention relates to a bearing arrangement of a vertically standing drive spindle, in particular a vertical feed axis of a machine tool.
  • the invention is therefore based on the problem to provide a bearing assembly that provides an accurate and axially well-sustainable spindle bearing.
  • a bearing assembly of the type described by two successively interconnected in the axial direction bearings one of which is an axial angular contact ball bearings and the other is a radial angular contact ball bearings, the axial angular contact ball bearings - seen in the direction of the force applied in the axial direction weight of the drive spindle - the radial angular contact ball bearing is connected downstream.
  • an axial angular contact ball bearing and a radial angular contact ball bearing are combined with particular advantage.
  • the bearing arrangement takes advantage of both types of bearings, namely on the one hand, the high rigidity and accuracy of the axial angular contact ball bearing, on the other hand, the high axial load capacity of the radial angular contact ball bearing. This results in a compact storage unit for vertical drive axles, which makes an integrated weight compensation makes possible and has a very long service life.
  • both angular contact ball bearings are supported directly or indirectly with their outer rings in a common bearing bracket. This makes it possible to build a ready-to-install bearing unit, which is a compact component.
  • a particularly expedient development of the invention provides for biasing the radial angular contact ball bearing against the direction of the weight force via one or more spring elements.
  • the radial angular contact ball bearing thus acts weight relieving the axial angular contact ball bearings, that is, that the axial angular contact ball bearings is relieved of static weight forces by the biased via the springs radial angular contact ball bearings. This is to the advantage of a lifting of the unloaded rows of storage is avoided by a one-sided high load.
  • the axial angular contact ball bearing only needs to absorb the loads from the dynamics of the drive spindle or the moving masses, which offers the opportunity to use a smaller bearing with higher permissible speed for this purpose.
  • the radial angular contact ball bearing primarily absorbs the static weight, so it is designed with respect to this. As a result of the bearing preload via the spring elements, the respective weight force can therefore be incorporated. and thus the load on the warehouse can be further reduced. Overall, in particular from the spring preload of the radial angular contact ball bearing results in a very high bearing life of both bearings with good speed suitability and low installation dimensions.
  • the bearing assembly For concrete realization of the bias voltage and to enable a compact construction of the bearing assembly is further provided to arrange the outer ring of the radial angular contact ball bearing on a preloaded via the spring or the bearing support ring, the one or more spring elements axially on the bearing holder or a support ring of the bearing holder are superimposed.
  • the spring elements themselves are preferably coil springs, which are accommodated in provided on the outer ring of the radial angular contact ball bearing or bearing support ring holes. They are expediently spaced equidistantly in order to realize a symmetrical bias.
  • the figure shows a bearing assembly 1 comprising a bearing holder 2, in which via a radial angular contact ball bearing 3 and a double row axial angular contact ball bearing 4, a drive spindle 5, which extends vertically in the installed position as shown in the figure, is rotatably mounted.
  • the bearing holder 2 has a stepped central bearing receptacle 6, in which the radial angular contact ball bearing 3 is accommodated in a first recess section 6a, while the radial angular contact ball bearing 3 is viewed in the direction of the weight force F G.
  • switched axial angular contact ball bearings 4 is arranged in a recess portion 6b.
  • the radial angular contact ball bearing 3 is rotatably connected with its inner ring 7 via a bearing sleeve 8 with the drive shaft 5.
  • the outer ring 9 of the radial angular contact ball bearing 3 is arranged on a bearing support ring 10.
  • This in turn has a plurality of holes 11, which are designed as blind holes and in which spring elements 12, here in the form of coil springs, are added.
  • the holes 11 as the spring elements 12 are axially directed, that is, the spring elements 12 bias the radial angular contact ball bearing 3 against the weight F G before.
  • the spring elements 12 With its lower end, the spring elements 12 are supported on a support ring 13 of the bearing holder 2, which in turn rests on the shoulder 14 of the recess 6a.
  • the axial angular contact ball bearing in turn is with its inner ring 15 (shown here are two separate inner ring halves) rotatably connected to the drive shaft 5, while the outer ring 16 is received positively in the recess portion 6b.
  • the radial angular contact ball bearing is biased against the weight F G via the equidistantly distributed spring elements 12.
  • the radial angular contact ball bearings can be designed for the respective male, static load, so the static weight and the bearing load can be reduced to a minimum.
  • the radial angular contact ball bearing relieves the axial angular contact ball bearings from the static weight forces, which means that the axial angular contact ball bearings in turn primarily only have to absorb the loads from the drive spindle movement or the mass movement.
  • a relatively small axial angular contact ball bearing can be used, as can be seen in the figure.
  • the requirements for the tolerances of the bearing holder 2, so the housing of the bearing assembly are kept low by the resilient employment of the radial angular contact ball bearing, which is received on the bearing support ring 10 with a slight clearance in the recessed portion 6a, a costly vote of the two Bearing each other is not required.
  • the integrated weight compensation via the spring preload of the radial angular contact ball bearing design requirements continue to apply to the adjacent construction, as would otherwise be required for a mechanical counterbalance with pneumatic or hydraulic elements, gas springs or counterweights.

Abstract

The invention relates to a bearing arrangement of a vertically standing drive spindle, particularly a vertical feed shaft of a machine tool, characterized by two rolling-element bearings connected one behind the other in the axial direction, of which one is an axial angular contact ball bearing (4) and the other is a radial angular contact ball bearing (3), wherein the axial angular contact ball bearing (4) is connected after the radial angular contact ball bearing (3) viewed in the direction of the weight force of the drive spindle (5) applied in the axial direction.

Description

Bezeichnung der Erfindung Name of the invention
Lageranordnung einer vertikal stehenden AntriebsspindelBearing arrangement of a vertical drive spindle
Beschreibungdescription
Gebiet der ErfindungField of the invention
Die Erfindung betrifft eine Lageranordnung einer vertikal stehenden Antriebsspindel, insbesondere einer senkrechten Zustellachse einer Werkzeugmaschine.The invention relates to a bearing arrangement of a vertically standing drive spindle, in particular a vertical feed axis of a machine tool.
Viele Maschinen wie beispielsweise Werkzeugmaschinen weisen vertikal ste- hende Antriebsspindeln auf, die beispielsweise im Falle einer Werkzeugmaschine eine vertikale Zustellachse für ein Werkzeug bilden. Solche Antriebsspindeln oder Gewindetriebe sind in der Regel einer hohen einseitigen Belastung ausgesetzt. Die Achse selbst hat oft ein hohes Eigengewicht, soll aber aufgrund von sehr kleinen Zykluszeiten sehr schnell verfahren werden, das heißt, dass die Antriebsspindel wegen ihrer üblicherweise realisierten kleinen Steigung mit hoher Drehzahl betrieben wird, wobei häufig auch hohe Einschaltdauern aufgrund der kurzen Zyklen realisiert sind.Many machines, such as machine tools, have vertical drive spindles which, for example in the case of a machine tool, form a vertical feed axis for a tool. Such drive spindles or screw drives are usually exposed to a high one-sided load. The axis itself often has a high dead weight, but is due to very small cycle times are moved very fast, that is, the drive spindle is operated because of their usually realized small slope at high speed, often high duty cycles are realized due to the short cycles ,
Hintergrund der ErfindungBackground of the invention
Der Erfindung liegt damit das Problem zugrunde, eine Lageranordnung anzugeben, die eine genaue und axial gut tragfähige Spindellagerung bietet.The invention is therefore based on the problem to provide a bearing assembly that provides an accurate and axially well-sustainable spindle bearing.
Zur Lösung dieses Problems ist eine Lageranordnung der beschriebenen Art durch zwei einander in Achsrichtung hintereinander geschaltete Wälzlager gekennzeichnet, von denen eines ein Axial-Schrägkugellager und das andere ein Radial-Schrägkugellager ist, wobei das Axial-Schrägkugellager - gesehen in Richtung der in Achsrichtung anliegenden Gewichtskraft der Antriebsspindel - dem Radial-Schrägkugellager nachgeschaltet ist.To solve this problem, a bearing assembly of the type described by two successively interconnected in the axial direction bearings, one of which is an axial angular contact ball bearings and the other is a radial angular contact ball bearings, the axial angular contact ball bearings - seen in the direction of the force applied in the axial direction weight of the drive spindle - the radial angular contact ball bearing is connected downstream.
Zusammenfassung der ErfindungSummary of the invention
Bei der erfindungsgemäßen Lageranordnung ist mit besonderem Vorteil ein Axial-Schrägkugellager und ein Radial-Schrägkugellager kombiniert. Die Lageranordnung nützt die Vorteile beider Lagertypen, nämlich zum einen die hohe Steifigkeit und Genauigkeit des Axial-Schrägkugellagers, zum anderen die hohe axiale Tragfähigkeit des Radial-Schrägkugellagers. Hieraus resultiert eine kompakte Lagereinheit für senkrechte Antriebsachsen, die einen integrierten Gewichtsausgleich möglicht macht und eine sehr hohe Gebrauchsdauer aufweist.In the bearing arrangement according to the invention, an axial angular contact ball bearing and a radial angular contact ball bearing are combined with particular advantage. The bearing arrangement takes advantage of both types of bearings, namely on the one hand, the high rigidity and accuracy of the axial angular contact ball bearing, on the other hand, the high axial load capacity of the radial angular contact ball bearing. This results in a compact storage unit for vertical drive axles, which makes an integrated weight compensation makes possible and has a very long service life.
Zur weiteren Kompaktierung der Gesamtbaueinheit ist es vorteilhaft, wenn beide Schrägkugellager mit ihren Außenringen in einer gemeinsamen Lagerhalterung direkt oder indirekt abgestützt sind. Dies ermöglicht es, eine einbaufertige Lagereinheit aufzubauen, die ein kompaktes Bauteil darstellt.For further compaction of the overall assembly, it is advantageous if both angular contact ball bearings are supported directly or indirectly with their outer rings in a common bearing bracket. This makes it possible to build a ready-to-install bearing unit, which is a compact component.
Eine besonders zweckmäßige Weiterbildung der Erfindung sieht vor, das Radial-Schrägkugellager über ein oder mehrere Federelemente entgegen der Richtung der Gewichtskraft vorzuspannen. Das Radial-Schrägkugellager wirkt somit gewichtsentlastend für das Axial-Schrägkugellager, das heißt, dass das Axial-Schrägkugellager durch das über die Federn vorgespannte Radial- Schrägkugellager von statischen Gewichtskräften entlastet wird. Dies ist dahingehend von Vorteil, als ein Abheben der unbelasteten Lagerreihen durch eine einseitig wirkende hohe Belastung vermieden wird. Das Axial- Schrägkugellager braucht also nur noch die Belastungen aus der Dynamik der Antriebsspindel beziehungsweise der bewegten Massen aufzunehmen, was die Möglichkeit bietet, hierfür ein kleineres Lager mit höherer zulässiger Drehzahl einzusetzen. Das Radial-Schrägkugellager nimmt primär die statische Gewichtskraft auf, ist also bezüglich dieser ausgelegt. Durch die Lagervorspannung über die Federelemente kann folglich die jeweilige Gewichtskraft einge- stellt und somit die Belastung des Lagers weiter reduziert werden. Insgesamt resultiert insbesondere aus der Federvorspannung des Radial- Schrägkugellagers eine sehr hohe Lagergebrauchsdauer beider Lager bei guter Drehzahleignung und geringen Einbaumaßen.A particularly expedient development of the invention provides for biasing the radial angular contact ball bearing against the direction of the weight force via one or more spring elements. The radial angular contact ball bearing thus acts weight relieving the axial angular contact ball bearings, that is, that the axial angular contact ball bearings is relieved of static weight forces by the biased via the springs radial angular contact ball bearings. This is to the advantage of a lifting of the unloaded rows of storage is avoided by a one-sided high load. Thus, the axial angular contact ball bearing only needs to absorb the loads from the dynamics of the drive spindle or the moving masses, which offers the opportunity to use a smaller bearing with higher permissible speed for this purpose. The radial angular contact ball bearing primarily absorbs the static weight, so it is designed with respect to this. As a result of the bearing preload via the spring elements, the respective weight force can therefore be incorporated. and thus the load on the warehouse can be further reduced. Overall, in particular from the spring preload of the radial angular contact ball bearing results in a very high bearing life of both bearings with good speed suitability and low installation dimensions.
Zur konkreten Realisierung der Vorspannung sowie zur Ermöglichung eines kompakten Aufbaus der Lageranordnung ist ferner vorgesehen, den Außenring des Radial-Schrägkugellagers an einem über das oder die Federelemente vorgespannten Lagerhalterungsring anzuordnen, wobei das oder die Federele- mente axial an der Lagerhalterung oder einem Stützring der Lagerhalterung aufgelagert sind. Die Federelemente selbst sind vorzugsweise Schraubenfedern, die in am Außenring des Radial-Schrägkugellagers oder am Lagerhalterungsring vorgesehenen Bohrungen aufgenommen sind. Sie sind zweckmäßigerweise äquidistant beabstandet, um eine symmetrische Vorspannung zu rea- lisieren.For concrete realization of the bias voltage and to enable a compact construction of the bearing assembly is further provided to arrange the outer ring of the radial angular contact ball bearing on a preloaded via the spring or the bearing support ring, the one or more spring elements axially on the bearing holder or a support ring of the bearing holder are superimposed. The spring elements themselves are preferably coil springs, which are accommodated in provided on the outer ring of the radial angular contact ball bearing or bearing support ring holes. They are expediently spaced equidistantly in order to realize a symmetrical bias.
Kurze Beschreibung der ZeichnungShort description of the drawing
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus dem im Folgenden beschriebenen Ausführungsbeispiel sowie anhand der Zeichnung.Further advantages, features and details of the invention will become apparent from the embodiment described below and from the drawing.
Ausführliche Beschreibung der ZeichnungDetailed description of the drawing
Die Figur zeigt eine Lageranordnung 1 umfassend eine Lagerhalterung 2, in der über ein Radial-Schrägkugellager 3 sowie ein doppelreihiges Axial- Schrägkugellager 4 eine Antriebsspindel 5, die in der Einbaustellung wie in der Figur gezeigt vertikal verläuft, drehgelagert ist. Die Lagerhalterung 2 weist eine gestufte mittige Lageraufnahme 6, in der die das Radial-Schrägkugellager 3 in einem ersten Ausnehmungsabschnitt 6a aufgenommen ist, während das dem Radial-Schrägkugellager 3 in Richtung der Gewichtskraft FG gesehen nachge- schaltete Axial-Schrägkugellager 4 in einem Ausnehmungsabschnitt 6b angeordnet ist.The figure shows a bearing assembly 1 comprising a bearing holder 2, in which via a radial angular contact ball bearing 3 and a double row axial angular contact ball bearing 4, a drive spindle 5, which extends vertically in the installed position as shown in the figure, is rotatably mounted. The bearing holder 2 has a stepped central bearing receptacle 6, in which the radial angular contact ball bearing 3 is accommodated in a first recess section 6a, while the radial angular contact ball bearing 3 is viewed in the direction of the weight force F G. switched axial angular contact ball bearings 4 is arranged in a recess portion 6b.
Das Radial-Schrägkugellager 3 ist mit seinem Innenring 7 drehfest über eine Lagerhülse 8 mit der Antriebswelle 5 verbunden. Der Außenring 9 des Radial- Schrägkugellagers 3 ist an einem Lagerhalterungsring 10 angeordnet. Dieser wiederum weist eine Vielzahl von Bohrungen 11 auf, die als Sackbohrungen ausgeführt sind und in denen Federelemente 12, hier in Form von Schraubenfedern, aufgenommen sind. Die Bohrungen 11 wie die Federelemente 12 sind axial gerichtet, das heißt, die Federelemente 12 spannen das Radial- Schrägkugellager 3 entgegen der Gewichtskraft FG vor. Mit ihrem unteren Ende sind die Federelemente 12 an einem Stützring 13 der Lagerhalterung 2 aufgelagert, der seinerseits auf der Schulter 14 der Ausnehmung 6a aufliegt.The radial angular contact ball bearing 3 is rotatably connected with its inner ring 7 via a bearing sleeve 8 with the drive shaft 5. The outer ring 9 of the radial angular contact ball bearing 3 is arranged on a bearing support ring 10. This in turn has a plurality of holes 11, which are designed as blind holes and in which spring elements 12, here in the form of coil springs, are added. The holes 11 as the spring elements 12 are axially directed, that is, the spring elements 12 bias the radial angular contact ball bearing 3 against the weight F G before. With its lower end, the spring elements 12 are supported on a support ring 13 of the bearing holder 2, which in turn rests on the shoulder 14 of the recess 6a.
Das Axial-Schrägkugellager seinerseits ist mit seinem Innenring 15 (gezeigt sind hier zwei separate Innenringhälften) drehfest mit der Antriebswelle 5 verbunden, während der Außenring 16 in dem Ausnehmungsabschnitt 6b formschlüssig aufgenommen ist.The axial angular contact ball bearing in turn is with its inner ring 15 (shown here are two separate inner ring halves) rotatably connected to the drive shaft 5, while the outer ring 16 is received positively in the recess portion 6b.
Ersichtlich ist das Radial-Schrägkugellager über die äquidistant verteilten Federelemente 12 entgegen der Gewichtskraft FG vorgespannt. Durch die Wahl der Federelemente und damit die Wahl der Vorspannung kann das Radial- Schrägkugellager auf die jeweilige aufzunehmende, statische Belastung, also die statische Gewichtskraft ausgelegt werden und die Lagerbelastung auf ein Minimum reduziert werden.As can be seen, the radial angular contact ball bearing is biased against the weight F G via the equidistantly distributed spring elements 12. By choosing the spring elements and thus the choice of bias, the radial angular contact ball bearings can be designed for the respective male, static load, so the static weight and the bearing load can be reduced to a minimum.
Das Radial-Schrägkugellager entlastet das Axial-Schrägkugellager von den statischen Gewichtskräften, das heißt, dass das Axial-Schrägkugellager seinerseits primär nur noch die Belastungen aus der Antriebsspindelbewegung respektive der Massenbewegung aufnehmen muss. Infolgedessen kann ein relativ kleines Axial-Schrägkugellager verwendet werden, wie in der Figur ersichtlich ist. Die Anforderungen an die Toleranzen der Lagerhalterung 2, also des Gehäuses der Lageranordnung, werden durch die federnde Anstellung des Radial- Schrägkugellagers, das über den Lagerhalterungsring 10 mit leichtem Spiel in dem Ausnehmungsabschnitt 6a aufgenommen ist, niedrig gehalten, eine auf- wändige Abstimmung der beiden Lager aufeinander ist nicht erforderlich. Infolge des integrierten Gewichtsausgleichs über die Federvorspannung des Radi- al-Schrägkugellagers entfallen weiterhin konstruktive Anforderungen an die Anschlusskonstruktion, wie sie ansonsten für einen mechanischen Gewichtsausgleich mit pneumatischen oder hydraulischen Elementen, Gasdruck- federn oder Gegengewichten erforderlich wären. The radial angular contact ball bearing relieves the axial angular contact ball bearings from the static weight forces, which means that the axial angular contact ball bearings in turn primarily only have to absorb the loads from the drive spindle movement or the mass movement. As a result, a relatively small axial angular contact ball bearing can be used, as can be seen in the figure. The requirements for the tolerances of the bearing holder 2, so the housing of the bearing assembly are kept low by the resilient employment of the radial angular contact ball bearing, which is received on the bearing support ring 10 with a slight clearance in the recessed portion 6a, a costly vote of the two Bearing each other is not required. As a result of the integrated weight compensation via the spring preload of the radial angular contact ball bearing design requirements continue to apply to the adjacent construction, as would otherwise be required for a mechanical counterbalance with pneumatic or hydraulic elements, gas springs or counterweights.
BezugszahlenlisteLIST OF REFERENCE NUMBERS
1 Lageranordnung1 bearing arrangement
2 Lagerhalterung2 bearing bracket
3 Radial-Schrägkugellager3 radial angular contact ball bearings
4 Axial-Schrägkugellager4 axial angular contact ball bearings
5 Antriebsspindel5 drive spindle
6 Lageraufnahme6 bearing support
6a Ausnehmungsabschnitt6a recess section
6b Ausnehmungsabschnitt6b recess section
7 Innenring7 inner ring
8 Lagerhülse8 bearing sleeve
9 Außenring9 outer ring
10 Lagerhalterungsring10 bearing support ring
11 Bohrungen11 holes
12 Federelemente12 spring elements
13 Stützring13 support ring
14 Schulter14 shoulder
15 Innenring15 inner ring
16 Außenring 16 outer ring

Claims

Patentansprüche claims
1. Lageranordnung einer vertikal stehenden Antriebsspindel, insbesondere einer senkrechten Zustellachse einer Werkzeugmaschine, gekennzeich- net durch zwei einander in Achsrichtung hintereinander geschaltete1. Bearing arrangement of a vertically standing drive spindle, in particular a vertical feed axis of a machine tool, characterized by two mutually in the axial direction connected in series
Wälzlager, von denen eines ein Axial-Schrägkugellager (4) und das andere ein Radial-Schrägkugellager (3) ist, wobei das Axial- Schrägkugellager (4) - gesehen in Richtung der in Achsrichtung anliegenden Gewichtskraft der Antriebsspindel (5) - dem Radial- Schrägkugellager (3) nachgeschaltet ist.Rolling bearings, one of which is an axial angular contact ball bearing (4) and the other a radial angular contact ball bearing (3), wherein the axial angular contact ball bearing (4) - seen in the direction of the force applied in the axial direction of the drive spindle (5) - the Radial Angular contact ball bearing (3) is connected downstream.
2. Lageranordnung nach Anspruch 1 , dadurch gekennzeichnet, dass beide Schrägkugellager (3, 4) mit ihren Außenringen (9, 16) in einer gemeinsamen Lagerhalterung (2) direkt oder indirekt abgestützt sind.2. Bearing arrangement according to claim 1, characterized in that both angular contact ball bearings (3, 4) with their outer rings (9, 16) in a common bearing holder (2) are supported directly or indirectly.
3. Lageranordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Radial-Schrägkugellager (3) über ein oder mehrere Federelemente (12) entgegen der Richtung der Gewichtskraft (FG) vorgespannt ist.3. Bearing arrangement according to claim 1 or 2, characterized in that the radial angular contact ball bearing (3) via one or more spring elements (12) against the direction of the weight (F G ) is biased.
4. Lageranordnung nach Anspruch 3, dadurch gekennzeichnet, dass der Außenring (9) des Radial-Schrägkugellagers (3) an einem über das oder die Federelemente (12) vorgespannten Lagerhalterungsring (10) angeordnet ist, wobei das oder die Federelemente (12) axial an der Lagerhal- terung (2) oder einem Stützring (13) der Lagerhalterung (2) aufgelagert sind.4. Bearing arrangement according to claim 3, characterized in that the outer ring (9) of the radial angular contact ball bearing (3) on a via the spring or the elements (12) biased bearing support ring (10) is arranged, wherein the one or more spring elements (12) axially on the bearing holder (2) or a support ring (13) of the bearing holder (2) are superimposed.
5. Lageranordnung nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass das oder die Federelemente (12) Schraubenfedern sind, das oder die in am Außenring des Radial-Schrägkugellagers oder des Lagerhalterungsrings (10) vorgesehenen Bohrungen (11 ) aufgenommen sind. 5. Bearing arrangement according to claim 3 or 4, characterized in that the one or more spring elements (12) are coil springs, which or in the outer ring of the radial angular contact ball bearing or bearing support ring (10) provided bores (11) are accommodated.
PCT/EP2009/063804 2008-10-30 2009-10-21 Bearing arrangement of a vertically standing drive spindle WO2010049328A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008054013A DE102008054013A1 (en) 2008-10-30 2008-10-30 Bearing arrangement of a vertical drive spindle
DE102008054013.7 2008-10-30

Publications (2)

Publication Number Publication Date
WO2010049328A2 true WO2010049328A2 (en) 2010-05-06
WO2010049328A3 WO2010049328A3 (en) 2011-01-20

Family

ID=42062961

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/063804 WO2010049328A2 (en) 2008-10-30 2009-10-21 Bearing arrangement of a vertically standing drive spindle

Country Status (2)

Country Link
DE (1) DE102008054013A1 (en)
WO (1) WO2010049328A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103328837A (en) * 2010-11-12 2013-09-25 Skf公司 Anti-friction bearing carrier module and compressor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105805174A (en) * 2016-05-19 2016-07-27 江苏凌特精密机械销售有限公司 Abrasion-resistant and pressure-resistant rolling bearing pedestal

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2626842A (en) * 1950-07-06 1953-01-27 Decatur Pump Company Load equalizing device for thrust bearings
JPS61103012A (en) * 1984-10-23 1986-05-21 Ntn Toyo Bearing Co Ltd High speed rolling bearing device
EP1972410A1 (en) * 2007-03-23 2008-09-24 JTEKT Corporation Spindle apparatus

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE166796C (en) *
US2556317A (en) * 1948-04-06 1951-06-12 Laval Separator Co De Bearing assembly for centrifuges and the like
US2656227A (en) * 1952-02-01 1953-10-20 A V Roe Canada Ltd Compensating metallic thrust ring
SE439961B (en) * 1983-04-22 1985-07-08 Alfa Laval Separation Ab Suspension device for a rotatable spindle
US4730995A (en) * 1986-09-25 1988-03-15 American Standard Inc. Screw compressor bearing arrangement with positive stop to accommodate thrust reversal
SE469396B (en) * 1991-11-13 1993-06-28 Svenska Rotor Maskiner Ab SCREW ROTATOR WITH AXIAL BALANCED STORES
ATE329722T1 (en) * 2001-04-25 2006-07-15 Tornos Sa Fabrique De Machine SPINDLE STRUCTURE
DE102006046173A1 (en) * 2006-09-29 2008-04-03 Schaeffler Kg Angular single-row ball bearing, for a machine tool feed spindle, has a flange extension at the outer ring with drillings to take screw bolts for clamping in place

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2626842A (en) * 1950-07-06 1953-01-27 Decatur Pump Company Load equalizing device for thrust bearings
JPS61103012A (en) * 1984-10-23 1986-05-21 Ntn Toyo Bearing Co Ltd High speed rolling bearing device
EP1972410A1 (en) * 2007-03-23 2008-09-24 JTEKT Corporation Spindle apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103328837A (en) * 2010-11-12 2013-09-25 Skf公司 Anti-friction bearing carrier module and compressor

Also Published As

Publication number Publication date
WO2010049328A3 (en) 2011-01-20
DE102008054013A1 (en) 2010-05-06

Similar Documents

Publication Publication Date Title
DE10324621A1 (en) Electrical machine
DE102019103384A1 (en) Planetary screw drive
DE102011014079A1 (en) Multipoint radial bearing, has rolling elements constructed such that contact region with cylindrical mold is provided in middle of rolling elements, where elements are guided on ring by line contact and on another ring over point contacts
DE102016120357A1 (en) worm gear
DE102008013128A1 (en) Ball screw with rotationally driven ball nut
DE102007009453A1 (en) Multi ring-eccentric roller bearing for e.g. pressure cylinder of e.g. rotary printing machine, has main bearing formed by multi-row taper roller bearing, which has rolling body that is formed as ball rollers
DE3027263C2 (en) Bearing of journals in fork eyes of universal joints by means of a cylindrical roller bearing
WO2008119597A2 (en) Axial angular contact ball bearing arranged in four rows, comprising spherical rollers, particularly for mounting a rotary table on machine tools
DE102011056031A1 (en) BALL SCREW DRIVE
DE3914552A1 (en) ROLLING BEARING
DE4404535C2 (en) Steering valve
WO2010049328A2 (en) Bearing arrangement of a vertically standing drive spindle
DE102007030408B4 (en) Device for a roll stand for rolling rod or tubular material with a roll holder and a roller
DE102009037392A1 (en) Antifriction bearing arrangement for mounting rotating shaft opposite to e.g. machine table, in round table device of machine tool, has bearing connected parallel to another bearing by pretensioning unit in main load effective direction
DE102007044702A1 (en) camp
DE102015221556A1 (en) Planetary roller screw (PWG) of an actuator
DE102019105114A1 (en) Planetary gear
DE102012221725A1 (en) Top plate bearing, has inner ring part and outer ring part that are mutually supported through set of axial and radial loads, and rolling bearings provided with respect to pressure angle and formed as axial bearing and contact bearing
DE2630035C3 (en) Device for the automatic adjustment of angular contact roller bearings of a bearing that are adjusted in pairs against one another
DE202012007700U1 (en) vacuum pump
DE4301178C2 (en) Cross pin joint of a universal joint shaft suitable for the transmission of high torques
DE102010045322A1 (en) Cage for e.g. retaining rollers of double-row taper roller bearing of wind power plant, has guide elements formed in side plates or non-perforated rollers for guiding rollers, where guide elements are formed as single-piece element
EP3421844B1 (en) Planetary gearing carrier assembly, vertical mill gear and vertical mill
DE202011004718U1 (en) Burnishing head
DE1239542B (en) Storage for tool spindles

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09737432

Country of ref document: EP

Kind code of ref document: A2

122 Ep: pct application non-entry in european phase

Ref document number: 09737432

Country of ref document: EP

Kind code of ref document: A2